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Finding the Fourth Proportional to 395,207.30, 545,396.70 and 240,105.80

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Solution

The fourth proportional to 395,207.30, 545,396.70 and 240,105.80 is: 331,352.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    395,207.30 : 545,396.70 = 240,105.80 : x
  2. Step 2: Convert to fraction form
    395,207.30/545,396.70 = 240,105.80/x
  3. Step 3: Cross multiply
    395,207.30x = 545,396.70 × 240,105.80
  4. Step 4: Simplify right side
    395,207.30x = 130,952,910,970.86
  5. Step 5: Solve for x
    x = 130,952,910,970.86/395,207.30
  6. Step 6: Final answer
    x = 331,352.46

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.